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Linksys E-Series
How to put your new router behind an
existing router
Why would I put my new router behind an existing router? There are several
possible scenarios in which you might want to use your new router "behind"
another router:
1. You might be in an environment that shares the landlord's Internet
connection with all tenants In this case, you should put your own router
behind the landlord's router in order to create your own private network
and to isolate computers on your network from the rest of the building
2. You are sharing an office building Internet connection, and you want to
control Internet access or the content viewed by your employees
3. You already have an existing network and you want to extend the
network's range or add wireless capabilities to your network
4. You want to separate older, less secure network devices from the rest of
the network
To add your router to an existing router or gateway
In most cases, you can easily add your router to an existing wireless network by
running Cisco Connect If you are unable to set up the additional router using
the instructions below, see "To share an Internet connection" on page 32 or "To
extend your network" on page 34
To add a router to your existing wireless network:
1. Insert the Cisco Connect setup CD into a CD/DVD drive on your computer,
then follow the on-screen instructions
2. When you are told to connect your router's Internet port to the LAN/
Ethernet port on your modem, connect your router's Internet port to
the LAN/Ethernet port on your existing (upstream) router or gateway
3. Follow the on-screen instructions until setup is complete
To share an Internet connection
NOTE
This is a complex process, so this procedure assumes that you have
some networking knowledge
To add another router to share an Internet connection:
This topic covers cases one and two above
1. Determine the IP address range for your upstream (office or building)
network
To determine the address range by using a Windows computer:
a. Connect your computer into your upstream network's router
b. Click Start, Run, type CMD, then click OK The command prompt
window appears
c. Type ipconfig, then press Enter
TIP
Although you can determine your computer's IP address in many
ways, this method is very fast
d. Take note of the IP address In this example, the IP address is
192 168 100 192
Setting Up: Advanced
32
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